7i92M very weird communication problem!!!

OK here we go:
1. 7i92m with a BOB, and the latest Linuxcnc.
2. card is setup at ip 10.10.10.10 it pings and i can flash the card with the bin file using MesaCT
3. Tested the card with the pathpilot and it works and moved the table.
4. when i use the linuxcnc pncconf wizard or the linuxcnc all comunications with the card stops, even the ping stops responding.
I'm stuck here any ideas?

Angelos

Not sure about pncconf, but LinuxCNC deliberately blocks card access when running.

Good to know, the only thing is that as soon the linuxcnc is open there is no lights activity at the Ethernet port,

If there was no communication, LinuxCNC should exit.

Are you saying LinuxCNC is running but you have no activity light
(green LED on 7I92 RJ45)?

What does:

ip a

report when in this state?

Linuxcnc is running, the light on the rj45 stays solid green and the lights on the board stay solid without any activity.   

OK, so there is a real time issue that needs to be addressed
before LinuxCNC will run on that system.

To get a rough idea of network latency:

sudo chrt 99 ping -i .001 -q -c 60000 10.10.10.10

This will run for a minute and then print statistics.

--- 10.10.10.10 ping statistics ---
60000 packets transmitted, 60000 received, 0% packet loss, time 60420ms
rtt min/avg/max/mdev = 0.057/0.276/16.993/0.227 ms, pipe 2

--- 10.10.10.10 ping statistics ---
60000 packets transmitted, 60000 received, 0% packet loss, time 60420ms
rtt min/avg/max/mdev = 0.057/0.276/16.993/0.227 ms, pipe 2

OK that (almost 17 ms) is the issue.

Depending on the Ethernet hardware on the host, solutions are:

If it's a Realtek MAC, install the DKMS driver

Disable PCIE/Ethernet power management

Make sure all power management is disabled in the BIOS
It that's not good enough, pin the Ethernet IRQ to the last processor
and use isolcpus in the kernel command line.

Here's a long  thread on solutions to this issue:

forum.linuxcnc.org/18-computer/56380-error-finishing-read-sigh
 

I reinstalled the ethernet drivers and got it down to 12ms so got it working for now, all tho at slow speeds. I order a faster mini computer so I hope that gets fixed, I installed a 7i76u daughter card, I flashed the bin file and nothing again the CR3 led is yellow and CR6 led is red. I installed the 7i92 with 7i76 bin file.